The present study analyzed the location and number of the diaphysial nutrient foramina in six long bones of adult human skeletons of unknown age and sex from a statistical view point. The diaphysial nutrient foramina in the humerus, are located at between 50 and 65% of the total length; in the radius and ulna, at between 25 and 50%; in the femur, at between 25 and 58%; in the tibia, at between 30 and 40%; and in the fibula at between 35 and 67%, i.e. the middle third of the bone. Also studied were the anatomical position and number of the diaphysial nutrient foramina in each bone.